問題解答

public class Demo { public static void main(String args[]){ for (int i = 1;i<=4 ;i++ )//換行程序 { for (int b = 1;b <= i ;b++ )//輸出前面的空格 { System.out.print(" "); } for (int j = 1;j <= 7-2*(i-1) ;j++ )//輸出

>>阅读原文<<